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#1
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Stefan brought up how the synthetic hbeta rendition of the NGC7K widefield
made using Halpha and [OIII] resembled an RGB nebula using the same idea but including the [SII] line, I made another such pseudo-true color image of the Veil region. in this current case this prescription was used Red = Ha + 30% [SII] (because the [SII] is in the red spectrum and also is weak compared to the Halpha) Green = [OIII] Blue = [OIII] + Hbeta Hbeta = 30% * Halpha (approximating the natural 2.92:1 ratio of Ha to Hb) I took the previous image, disassembled it and reassembled it according to the prescription above Here's the updated webpage with the non-downsized resolution versions linked: http://www.narrowbandimaging.com/vei...ao3s2_page.htm |
#2
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here's the original
"Richard Crisp" wrote in message . .. Stefan brought up how the synthetic hbeta rendition of the NGC7K widefield made using Halpha and [OIII] resembled an RGB nebula using the same idea but including the [SII] line, I made another such pseudo-true color image of the Veil region. in this current case this prescription was used Red = Ha + 30% [SII] (because the [SII] is in the red spectrum and also is weak compared to the Halpha) Green = [OIII] Blue = [OIII] + Hbeta Hbeta = 30% * Halpha (approximating the natural 2.92:1 ratio of Ha to Hb) I took the previous image, disassembled it and reassembled it according to the prescription above Here's the updated webpage with the non-downsized resolution versions linked: http://www.narrowbandimaging.com/vei...ao3s2_page.htm |
#3
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![]() Richard Crisp wrote: Stefan brought up how the synthetic hbeta rendition of the NGC7K widefield made using Halpha and [OIII] resembled an RGB nebula using the same idea but including the [SII] line, I made another such pseudo-true color image of the Veil region. in this current case this prescription was used Red = Ha + 30% [SII] (because the [SII] is in the red spectrum and also is weak compared to the Halpha) Green = [OIII] Blue = [OIII] + Hbeta Hbeta = 30% * Halpha (approximating the natural 2.92:1 ratio of Ha to Hb) I took the previous image, disassembled it and reassembled it according to the prescription above Here's the updated webpage with the non-downsized resolution versions linked: http://www.narrowbandimaging.com/vei...ao3s2_page.htm For comparison here's a repost of last year's true RGB version of the western side. The pink regions match though I show blue where your mix shows green. This was early in my RGB days. I really should redo it. Also it was with the floppy Meade focuser so stars on one side are elongated as it couldn't hold the camera in the image plane. Notice how much darker it is on the left side (inside of the bubble) than on the right or outside. Seems that bubble really is cleaning out space. If you hunt hard there's a faint galaxy in the image. Exposure was L=4x10' RGB 3x10'. Otherwise the same a most of my images today. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#4
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here's the new version that attempts to replicate the nebular color seen in
an RGB image "Richard Crisp" wrote in message . .. Stefan brought up how the synthetic hbeta rendition of the NGC7K widefield made using Halpha and [OIII] resembled an RGB nebula using the same idea but including the [SII] line, I made another such pseudo-true color image of the Veil region. in this current case this prescription was used Red = Ha + 30% [SII] (because the [SII] is in the red spectrum and also is weak compared to the Halpha) Green = [OIII] Blue = [OIII] + Hbeta Hbeta = 30% * Halpha (approximating the natural 2.92:1 ratio of Ha to Hb) I took the previous image, disassembled it and reassembled it according to the prescription above Here's the updated webpage with the non-downsized resolution versions linked: http://www.narrowbandimaging.com/vei...ao3s2_page.htm |
#5
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![]() "Richard Crisp" wrote ... here's the original....... I like 'um both!! ![]() George N |
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